Group

n

Cervical relaxation n (%)

Incomplete abortion n (%)

A

200

169 (84.50)

11 (5.00)

B

198

168 (84.85)

0*

C

197

60 (30.61)*^#

20 (10.20)^#

χ²

87.318

10.692

P

0.001

0.004